diff --git a/configure.ac b/configure.ac
index 0b6eb1ec7f..2df13d8ad2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -833,6 +833,9 @@ AC_CHECK_FUNCS(pthread_rwlockattr_setkind_np)
 AC_CHECK_FUNCS(pthread_cancel)
 AC_CHECK_FUNCS(sigset)
 
+dnl Check for fallocate() system call
+AC_CHECK_FUNCS(fallocate)
+
 dnl Semaphores
 if test "$ac_cv_header_semaphore_h" = "yes"; then
 AC_SEARCH_LIBS(sem_init, rt pthread)
diff --git a/src/jrd/os/posix/unix.cpp b/src/jrd/os/posix/unix.cpp
index 6ae6e58dfb..09b430eab0 100644
--- a/src/jrd/os/posix/unix.cpp
+++ b/src/jrd/os/posix/unix.cpp
@@ -307,7 +307,7 @@ void PIO_extend(Database* dbb, jrd_file* main_file, const ULONG extPages, const
  *
  **************************************/
 
-#ifdef HAVE_LINUX_FALLOC_H
+#if defined(HAVE_LINUX_FALLOC_H) && defined(HAVE_FALLOCATE)
 	ULONG leftPages = extPages;
 	for (jrd_file* file = main_file; file && leftPages; file = file->fil_next)
 	{
@@ -354,7 +354,7 @@ void PIO_extend(Database* dbb, jrd_file* main_file, const ULONG extPages, const
 	}
 #else
 	main_file->fil_flags |= FIL_no_fast_extend;
-#endif // HAVE_LINUX_FALLOC_H
+#endif // fallocate present
 
 	// not implemented
 	return;